module Gitlab module Graphql class Variables Invalid = Class.new(Gitlab::Graphql::StandardGraphqlError) def initialize(param) @param = param end def to_h ensure_hash(@param) end private # Handle form data, JSON body, or a blank value def ensure_hash(ambiguous_param) case ambiguous_param when String if ambiguous_param.present? ensure_hash(JSON.parse(ambiguous_param)) else {} end when Hash, ActionController::Parameters ambiguous_param when nil {} else raise Invalid, "Unexpected parameter: #{ambiguous_param}" end rescue JSON::ParserError => e raise Invalid.new(e) end end end end